Kansas City weather in September: Kansas City, Missouri: normal highs, lows, rain and records for September
Kansas City in September has a normal high of 79°F and a normal low of 58°F, a daily mean of 68°F, falling from 84°F on the 1st to 74°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 4.04 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 14°C, 103 mm of precipitation in September.
- NOAA stationKansas City International Airport
- Station IDUSW00003947
- Location39.30°N 94.73°W
- Elevation1,005 ft (306 m)
- From the center15 miles
- Population516,032
- Jan 38° 20°
- Feb 44° 24°
- Mar 55° 34°
- Apr 66° 44°
- May 75° 54°
- Jun 84° 64°
- Jul 88° 68°
- Aug 87° 66°
- Sep 79° 58°
- Oct 67° 46°
- Nov 54° 34°
- Dec 42° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Kansas City in September?
The normal high is 79°F and the normal low 58°F, for a daily mean of 68.4°F. September is 8.3°F cooler than August and 12.0°F warmer than October. September is the 4th warmest month of the year in Kansas City and the 6th wettest. Across the month the normal high falls 10°F, from 84°F on September 1 to 74°F on September 30. From one year to the next September's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 65°F and 72°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 63°F | 28% | 20% |
| September 8 | 82°F | 60°F | 28% | 20% |
| September 15 | 80°F | 58°F | 28% | 20% |
| September 22 | 77°F | 55°F | 28% | 19% |
| September 30 | 74°F | 52°F | 27% | 18% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 84°F | 63°F | 28% | 20% | 13 h 10 min |
| September 2 | 84°F | 63°F | 28% | 20% | 13 h |
| September 3 | 83°F | 62°F | 28% | 20% | 13 h |
| September 4 | 83°F | 62°F | 28% | 20% | 13 h |
| September 5 | 83°F | 62°F | 28% | 20% | 13 h |
| September 6 | 83°F | 61°F | 28% | 20% | 12 h 50 min |
| September 7 | 82°F | 61°F | 28% | 20% | 12 h 50 min |
| September 8 | 82°F | 60°F | 28% | 20% | 12 h 50 min |
| September 9 | 82°F | 60°F | 28% | 20% | 12 h 50 min |
| September 10 | 81°F | 60°F | 28% | 20% | 12 h 40 min |
| September 11 | 81°F | 59°F | 28% | 20% | 12 h 40 min |
| September 12 | 81°F | 59°F | 28% | 20% | 12 h 40 min |
| September 13 | 80°F | 59°F | 28% | 20% | 12 h 40 min |
| September 14 | 80°F | 58°F | 28% | 20% | 12 h 30 min |
| September 15 | 80°F | 58°F | 28% | 20% | 12 h 30 min |
| September 16 | 79°F | 57°F | 28% | 20% | 12 h 30 min |
| September 17 | 79°F | 57°F | 28% | 20% | 12 h 30 min |
| September 18 | 79°F | 57°F | 28% | 20% | 12 h 20 min |
| September 19 | 78°F | 56°F | 28% | 20% | 12 h 20 min |
| September 20 | 78°F | 56°F | 28% | 20% | 12 h 20 min |
| September 21 | 77°F | 55°F | 28% | 20% | 12 h 20 min |
| September 22 | 77°F | 55°F | 28% | 19% | 12 h 10 min |
| September 23 | 77°F | 55°F | 28% | 19% | 12 h 10 min |
| September 24 | 76°F | 54°F | 27% | 19% | 12 h 10 min |
| September 25 | 76°F | 54°F | 27% | 19% | 12 h 10 min |
| September 26 | 76°F | 54°F | 27% | 19% | 12 h |
| September 27 | 75°F | 53°F | 27% | 19% | 12 h |
| September 28 | 75°F | 53°F | 27% | 18% | 12 h |
| September 29 | 74°F | 52°F | 27% | 18% | 11 h 50 min |
| September 30 | 74°F | 52°F | 27% | 18% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 58°FSeptember average
- Precipitation
- 4.04 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 16
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003947; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Kansas City in September?
On a given September day the chance of 0.01 inch or more is 28% on average, highest around September 7 (28%). In all, 4.04 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Kansas City, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003947.
How humid and windy is Kansas City in September?
At 3 p.m. the normal temperature is 73°F with 48% relative humidity and a dew point of 52°F; at 6 a.m. it is 55°F with 84% humidity. The wind averages 9.5 mph, most often from the south in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 55°F | 50°F | 84% | 8.5 mph | 56% |
| 9 a.m. | 62°F | 52°F | 70% | 10.5 mph | 48% |
| noon | 70°F | 52°F | 53% | 11.8 mph | 45% |
| 3 p.m. | 73°F | 52°F | 48% | 11.6 mph | 40% |
| 6 p.m. | 67°F | 52°F | 59% | 8.1 mph | 48% |
| 9 p.m. | 61°F | 51°F | 70% | 8.8 mph | 58% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003947. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Kansas City?
The warmest September temperature on Kansas City's official record (since 1888) is 109°F, on September 3, 1947; the coldest is 31°F, on September 22, 1995. The wettest September brought 16.17 in (1914).
The September mean against the 1991-2020 normal of 68.4°F: 2021 71.8°F (+3.4), 2022 71.0°F (+2.6), 2023 71.7°F (+3.3), 2024 70.2°F (+1.8), 2025 71.0°F (+2.6), 2026 75.8°F (+7.4). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.8°F | +3.4°F | 2.10 in |
| 2022 | 71.0°F | +2.6°F | 0.84 in |
| 2023 | 71.7°F | +3.3°F | 1.01 in |
| 2024 | 70.2°F | +1.8°F | 1.48 in |
| 2025 | 71.0°F | +2.6°F | 1.58 in |
| 2026 | 75.8°F | +7.4°F | 6.93 in |
Source: records: ACIS, NWS threaded record MCIthr; recent months: ACIS, station USW00003947. Records and recent months use complete months only.
How does September in Kansas City compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, September normal highs run from 76°F in Unionville to 85°F in Kennett; Kansas City's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Kansas City in August87°F by day, 66°F at night
- Kansas City in October67°F by day, 46°F at night
- Kansas City through the yearEvery month, frost dates, records and recent years
- Missouri in SeptemberThe statewide normal and the warmest and coolest places
- Kennett: Missouri's warmest Septembernormal high 85°F